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AT Commands
Page 57
Refer to the mode table at the beginning of the User Guide - it shows the meaning of each
combination of the Mode LEDs.
To change the speed at which your modem connects after answering an incoming call:
• Place front panel Option switch 4 in the Up position (select Smart mode)
• Connect your modem to a personal computer — refer to the modem Read Me First Guide for
details
• Run a communications program and enter “local mode” or “terminal mode”
• Type: ATBx&W <E>
where “x” is a valid setting of the B command. For example, ATB13&W selects V.32 (9600
bps) mode.
The B command is used to set the communications standard used by your modem.
Hints for Unix Computers and Multiplexers
Many Unix computers and multiplexers which offer synchronous communications ports cannot
cope with the response messages generated by the modem. For this reason, you may wish to
switch off response messages before you connect your modem to the Unix computer or
multiplexer.
• Place front panel Option switch 4 in the Up position to select Smart mode
• Connect your modem to a personal computer, a Unix computer or a serial server — refer to
the modem Read Me First Guide for details
• Run a communications program and enter “local mode” or “terminal mode”
• Type: ATE0Q1&N0&W <E>
• Exit the communications program
This command switches off response messages and character echo, causes the modem to ignore
characters sent to it from the host while dialling or answering, and saves the changes in the
modem.
Dialling in Dumb Mode
There are three ways of dialling in dumb mode:
❏ Use a telephone handset connected to the modem.
❏ Store a telephone number in the modem and then have the computer raise the DTR signal.
❏ Store a telephone number in the modem and then press the Talk/Data switch.
Dialling with a Telephone Handset
Manual dialling requires a telephone handset to be connected to the same phone line as your
modem. Use a telephone cable with a double adaptor socket to connect your modem and
telephone to the same phone line
• Set up your modem in “smart mode”, using the AT commands.